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1892, and hatched on August 7. Of those bred, one attained 
the perfect state by the 19th September. The remaining 
pupze were divided into batches, one lot being subjected to 
varying high temperatures indoors, and consequently being 
forced out in November and December, and the other, con- 
sisting of eight pups, being placed out of doors exposed to the 
full cold of the winter. These latter emerged during the 
first nine days of April. A certain amount of variation existed 
between the examples; those which emerged in November 
and December of the same year showed marked darkening 
of the hindmargin of the underside of the hindwings, and were 
of a greyer colour than those which appeared in the spring, the 
undersides of the latter being of a warmer brown coloration. 
Mr. Tutt also exhibited the whole of a batch of fifty 
specimens of Amphidasys betularia bred by Mr. Williams 
from ova deposited by a female of normal type captured in 
Essex, the male parent being therefore unknown. The pro- 
geny ranged from a colour rather lighter than that of the 
normal form to a blackish tint almost equal to that of 
var. doubledayaria ; all intergrades were represented without 
sign of discontinuity. 
Mr. Bateson said that the series of P; egeria was especially 
interesting to him, as he had for some years been engaged in 
experimenting with varieties of that species. The specimens 
exhibited were all from New Forest eggs. Some had been 
warmed as pupze, while others had been exposed to the winter 
of 1892-93. The butterflies resulting from both lots were 
quite distinct from the ordinary English form of the species, 
having the yellow spots of the more fulvous colour charac- 
teristic of the variety found in Brittany. This form is almost 
exactly intermediate between P. egevia of the south of Europe 
and the English var. egeriades. Curiously enough, the speci- 
mens which had been exposed to winter were on the whole 
the warmest in colour. As regards the yellow of the upper 
side, any of these latter might have been taken for Breton 
specimens. The undersides were, however, peculiar, and un- 
like any specimens he had previously seen. All the eight 
were alike in having a dark area crossing the wings at about 
the second third. Beyond this dark area the colour was 
